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Abstract
A useful method employing liquid chromatography mass spectrometry (LC/MS) and a stable isotope was developed for simultaneous examination of major metabolism in adipocytes, de novo fatty acid synthesis, glycerol output, and glucose uptake with high sensitivity. The addition of thiazolidinediones, potent agonists of peroxisome proliferator-activated receptors-γ, for 10 d increased glucose uptake in a dose-dependent manner. Fatty acid (FA) synthesis increased at low concentrations of thiazolidinediones (TZDs) and decreased at high concentrations. It is important to assess adipocytes from various examples of metabolism, because each example of adipocyte metabolism is directly related to obesity or metabolic syndrome in various ways. The technique makes metabolic examination easier than conventional methods by means of radioisotopes and makes it possible to identify metabolites and to apply them in biomarker screening.